1、首先新建了布局模板XML文件vifi.xml,代碼很簡單，如下：?<?xml?version="1.0"?encoding="utf-8"?>

<LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"

????????android:orientation="vertical"?android:layout_width="fill_parent"

????????android:layout_height="fill_parent">

????????

????????<TextView?android:id="@+id/wifi"?

????????android:layout_width="fill_parent"

????????android:layout_height="wrap_content"?

????????android:text="@string/hello"?/>



</LinearLayout>

?

2、寫java代碼，新建個Activity，代碼如下：?package?com.eoeandroid.demo.testcode;



import?java.util.List;



import?android.app.Activity;

import?android.content.BroadcastReceiver;

import?android.content.Context;

import?android.content.Intent;

import?android.content.IntentFilter;

import?android.net.wifi.ScanResult;

import?android.net.wifi.WifiManager;

import?android.os.Bundle;

import?android.view.Menu;

import?android.view.MenuItem;

import?android.widget.TextView;



public?class?WifiTester?extends?Activity?{

????????TextView?mainText;

????????WifiManager?mainWifi;

????????WifiReceiver?receiverWifi;

????????List<ScanResult>?wifiList;

????????StringBuilder?sb?=?new?StringBuilder();



????????public?void?onCreate(Bundle?savedInstanceState)?{

????????????????super.onCreate(savedInstanceState);

????????????????setContentView(R.layout.vifi);

????????????????setTitle("eoe教程:?Wifi?Test.??-by:IceskYsl");

????????????????mainText?=?(TextView)?findViewById(R.id.wifi);

????????????????mainWifi?=?(WifiManager)?getSystemService(Context.WIFI_SERVICE);



????????????????receiverWifi?=?new?WifiReceiver();

????????????????registerReceiver(receiverWifi,?new?IntentFilter(

????????????????????????????????WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));

????????????????mainWifi.startScan();

????????????????mainText.setText("\nStarting?Scan...\n");

????????}



????????public?boolean?onCreateOptionsMenu(Menu?menu)?{

????????????????menu.add(0,?0,?0,?"Refresh");

????????????????return?super.onCreateOptionsMenu(menu);

????????}



????????public?boolean?onMenuItemSelected(int?featureId,?MenuItem?item)?{

????????????????mainWifi.startScan();

????????????????mainText.setText("Starting?Scan");

????????????????return?super.onMenuItemSelected(featureId,?item);

????????}



????????protected?void?onPause()?{

????????????????unregisterReceiver(receiverWifi);

????????????????super.onPause();

????????}



????????protected?void?onResume()?{

????????????????registerReceiver(receiverWifi,?new?IntentFilter(

????????????????????????????????WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));

????????????????super.onResume();

????????}



????????class?WifiReceiver?extends?BroadcastReceiver?{



????????????????public?void?onReceive(Context?c,?Intent?intent)?{

????????????????????????sb?=?new?StringBuilder();

????????????????????????wifiList?=?mainWifi.getScanResults();

????????????????????????for?(int?i?=?0;?i?<?wifiList.size();?i++)?{

????????????????????????????????sb.append(new?Integer(i?+?1).toString()?+?".");

????????????????????????????????sb.append((wifiList.get(i)).toString());

????????????????????????????????sb.append("\n\n");

????????????????????????}

????????????????????????mainText.setText(sb);

????????????????}

????????}

}

?

3、申請相關權限，代碼如下：?<uses-permission?android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>?

<uses-permission?android:name="android.permission.ACCESS_CHECKIN_PROPERTIES"></uses-permission>?

<uses-permission?android:name="android.permission.WAKE_LOCK"></uses-permission>?

<uses-permission?android:name="android.permission.INTERNET"></uses-permission>?

<uses-permission?android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>?

<uses-permission?android:name="android.permission.MODIFY_PHONE_STATE"></uses-permission>

?

轉載：http://www.eoeandroid.com/viewthread.php?tid=386

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